A previously reported heavyweight bout between Alistair Overeem and recent UFC castoff Todd Duffee now is set for Friday’s DREAM “Dynamite!! 2010″ event.

Officials today announced the fight while also clarifying the fight structure for a “special rules” bout between former DREAM champ Shinya Aoki and K-1 MAX Japan Tournament Champion Yuichiro Nagashima.

As of now, the Overeem vs. Duffee fight is slated as a non-title bout.

DREAM “Dynamite!! 2010″ takes place at the Saitama Super Arena in Saitama, Japan. The event airs in the U.S. on HDNet (4 a.m. ET).

Before the recent booking of Duffee, DREAM officials talked about Overeem possibly fighting for the organization’s first-ever heavyweight title. However, officials said it’s currently slated as a regular fight with three five-minute rounds.

Duffee hasn’t fought since May, when he was upset at UFC 114 by Chicago fighter Mike Russow. After dominating the fight for two-plus rounds, the iron-jawed Russow landed a right hand that knocked Duffee out cold in one of the most dramatic come-from-behind wins in UFC history. Duffee was expected to take on Jon Madsen at UFC 121 but withdrew from the fight in August with a knee injury. Less than a month later, he received an email from the UFC notifying him that he had been cut by the promotion because of his loss to Russow. UFC president Dana White later admitted “Duffee’s attitude” also played a part in the release.

In addition to the DREAM fight, Duffee currently is scheduled for a Jan. 29 Titan Fighting Championships 16 headliner with Abe Wagner. That event also airs on HDNet.

Overeem, Strikeforce’s current heavyweight champion, competes less than a month removed from an impressive performance in the K-1 World Grand Prix, where he claimed the kickboxing promotion’s tournament championship. His most recent MMA win came in May, when he made a successful Strikeforce title defense against Brett Rogers for his eighth straight win.

In addition to the heavyweight bout, DREAM officials clarified the “special rules” for Aoki vs. Nagashima. One three-minute kickboxing round will be followed by a five-minute MMA round. Open-finger gloves will be used, and if a winner hasn’t been determined by knockout or submission, the fight will be declared a draw.

Officials also clarified the rules for a Bob Sapp vs. Shinichi Suzukawa special-rules fight. The fight will be held under MMA rules, but the fighters won’t wear gloves. Closed-fist strikes are not allowed, though palm strikes are.

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